Preparation and Critical Performances of Lightweight Insulation High Ductility Cementitious Composites

被引：0
|
作者：
Ding C. [1 ]
Guo L. [1 ,2 ,3 ]
Lei D. [1 ]
Xu Y. [1 ]
Zhu Y. [1 ]
Deng Z. [4 ]
机构：
[1] School of Materials Science and Engineering, Southeast University, Nanjing
[2] Jiangsu Key Laboratory of Construction Materials, Nanjing
[3] Collaborative Innovation Center for Advanced Civil Engineering Materials, Nanjing
[4] Baohua Lin Industrial Development Co., Ltd., Yong'an
来源：
Cailiao Daobao/Materials Reports | 2019年 / 33卷 / 05期
关键词：
Ductility; Freeze-thaw; Impermeability; Insulation; Lightweight; Pore analysis; Thermal conductivity;
D O I：
10.11896/cldb.18020147
中图分类号：
学科分类号：
摘要：
Lightweight insulation and high ductility cementitious composites (LIHDCC), which density grade reach A10 and strength grade reach C20, were prepared in this study. Mechanical properties, thermal conductivity, uniaxial tensile properties, fiber/matrix interface bonding properties, frost resistance, chloride ion penetration resistance and pore structure were studied. The volume fractions of PVA fiber were 1.5% and 2%. The results showed that the compressive strength decreases with the increase of fiber content, but all could reach C20. The thermal conductivity reached 0.08 W/(m•K) and 0.10 W/(m•K), the ultimate tensile strain reached 0.72% and 0.85%. The average chemical bonding force of single fiber was 6.92 J/m2, the frictional force and slip hardening coefficient were 1.25 MPa and 0.42, respectively. LIHDCC have good resistance for chloride ion penetration and freezing thawing. Finally, the pore structure of LIHDCC was analyzed by CT. The average diameter of the evenly distributed bubbles was about 0-1 mm. © 2019, Materials Review Magazine. All right reserved.
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页码：1652 / 1658
页数：6
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